The Old Trafford side have agreed a £21.2m fee for the 27 year old and by all accounts will officially announce the capture next week.

Louis van Gaal has already completed one summer signing, having captured PSV Eindhoven’s Memphis Depay earlier this month, and appears very keen to bring in another wide-attacker.

Such a move may well send alarm bells ringing for the likes of Angel di Maria and Adnan Januzaj, whilst current first choice wingers Ashley Young and Juan Mata may well be looking over their shoulders as well.

Gaitan left Boca Juniors for Benfica in 2010 and has played a key role in his side’s back to back Primeira Liga title success over the past two campaigns.